eisner



(No Model.) .2'Sheets Sheet 1. G. BISNER.

SORTING 0R SIFTING APPARATUS.

N0. 511,51'7. Patented De0.'26, 1893.

. m kg AN Q J v v m. f r i A N a 7 Am .A. Q AN Q I W dz 1 THE NATIONAL umcanAPuma ccmunv (No Model.) 2-Sheets-Sheet 2.

G. EISNER.

SORTING 0R SIFTING APPARATUS. Patented Deg. 26',- 1893.

Z I &\

N Q A Q h web on said bars.

' NIT-ED STATE P TENT Cl rion.

GUSTAV EISNER, or 'NEUsTADT-ortTHE-HAaD'r, GERMANY.

SQRTING oR SIFTIN'G APPARATUS.

SPECIFICATION forming part of Letters Patent No. 511,517, dated December 26, 1893.

Applicationfiled March 30, 1893. a Serial No. 468,255. (No model.) Patented in England September 4, 1891, No. 14,9803. in Germany January 31, 1892,110- 66,868, and in Austriallungary February 20, 1892, No. 43,431 and No. 73,455.

T0 at whom itqncty concern:

Be it known that I, GUSTAV EISNER, a subject of the Emperor of Austria-Hungary, re siding at Neustadt-on-the-Hardt, in the Provlnce of Bavarian Palatinate, in the Empire of Germany, have invented certain new and useful Improvements in Sorting or Sifting Apparatus, (for which I have received Letters Patent in England September 4, 1891, No; 14,980; n Germany January 31, 1892, No. 66,868, and 1n Austria-Hungary February 20, 1892, Vienna, No.'43,431, and Buda-Pesth, No. 73,455,) and I do hereby declare the following to be a full, clear, and exact description of the inventron, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

My invention has relation to screening, bolting or sorting machines, its essential object being to provide a "screening or bolting,

device whose openings or spaces, i. e., whose meshes, are adapted to be adj usted,'according as a fineror coarser product is to be obtained. In the accompanying drawings-Figure 1 1s alongitudinal elevation partly in section of an apparatus embodying my invention, the bars of which the cylinde'rshell is formed be- 1ng shown in that position in which the interspaces are substantially closed by the radial Fig. 2 is a face'view of a portion of the rear'head of the apparatus, its shaft being shown in section. Fig. 3 is a crosssectional View of a portion of the apparatus. Fig. 4 is a like view taken about on the line 00, 0c, of Fig. 2. Fig. 5 is a detail elevation,

illustrating the arrangement of the screen bars, and Fig. 6 is a cross-section of one of said bars.

In Fig. 1 I have"illustrated a screening, bolting or sorting apparatus composed of two cylindrical screens, A and A, connected together in the usual or in any preferred, manner, as for instance, by a connecting sleeve, at, one of which screens will be provided with a feed cone, as g,for the reception of the delivery spout of a feed hopper, H, while the other screen will be-provided with a discharge sleeve, as h, for the discharge of the t'ailings,

to describe the construction of one of them. The screen comprises a skeleton or frame composed of the shaft,f, the head and tail rings, B, B, and a suitable number of intermediate bearing rings, 0, said head and tail rings being constructed in the form of a 1 same construction and it will therefore suffice spider or wheel, with-a hub, b, that is rigidly secured to the carrier shaft f. The head and tail rings, B, B, as well as the bearing rings, 0, have suitable bearing notches, a 0, Fig. 5, formed in their inner periphery, for the reception of bars, A, whose form in cross section is a cylinder, having a flat rib or web project ing radially therefrom, asshown in Fig. 6, the said web having suitable hiatuses ct at the points where the bars are supported in the bearings, a, in the rings, B, B, and c in the intermediate or hearing rings, 0, the bars being retained in their bearings in the several rings bylocking segmentsor rings, d, applied to the inner periphery of said rings, B, B, and

C. The distance between the bearings a, or c is such that when the bars are set to agiven position the web a of one bar will lie in conf tact with the cylindrical portion of the bar next preceding, as shown in dotted lines in Fig. 2 as regards some of the bars, A, so as to form a practically closed cylinder. At the rear or tail end of the screen, each bar A is provided with a crank a and a wrist pin, a,

which latter is pivotally connected by means of a link e, with a ring E revoluble upon the tail ring B. It is obvious that'when said ring E is revolved infthe direction of thearrow, Fig. 2, the cranks and links will be moved from the angular position shown in full lines until said cranks and links are extended to 'a straight line, as shown 'indotted lines,

when 'theweb' a? on one of the bars-will be, farthest awayfrom the cylindrical portion of the next preceding-bar, in which position the.

space between the bars will be greatest. In

short, by revolving the bars through an arc of ninety degrees a substantially closed cylinder is converted into a longitudinally slot- 5 ted cylinder the width of whose slots is gradually increased; I am thus enabled to vary the size of mesh of one screen relatively to that of the next preceding or succeeding connected screen, or to adjust or regulate the mesh of a screen as may be required at any time, either before or during the operation of screening.

In order that the intermediate rings may be held in their proper positions I employ substantially T-shaped spacing bars, 0, that are bolted to said rings, and the head and tail rings respectively, as shown.

The advantages inherent to a screen the mesh of which can be varied will be readily understood by those conversant with this state of the art, and need therefore not be referred to in detail.

Having thus described my invention, what I claim as new therein, and desire to secure by Letters Patent, is-

1. A screen or bolt consisting of a screening cylinder whose shell is composed of revoluble cylindrical bars provided with a fiat radial web or rib and having acrank and wrist pin at one end, of supporting head, tail and intermediate rings provided with hearin gs for said bars, and of a revoluble shaft to which the head and tail rings are secured, in combination with an actuating ring revoluble on the tail ring, and links pivotally connecting said ring with the wrist pins on the cranks of the screen bars, for the purpose set forth.

2. A screening or sorting machine comprising a screening cylinder composed of revoluble bars of greater diameter in one direction than in the other, in combination with means for rocking said bars simultaneously, consisting of an oscillatory ring and links connecting the ring to cranks on the bars, for the purpose set forth.

In testimony whereof I aflix my signature in presence of two witnesses.

GUSTAV EISNER.

Witnesses:

GUSTAV ADOLF KIES, PETER SCHNEIDER. 

